@All
Mine works perfect even with the last update. However, I have been testing and I get 3days and few hours if I let the Phone, Email and Conversations apps opened and minimized (as in task switcher) and whenever I need one I just tap it and comes full screen. I believe that starting quite often most used apps (phone, email, etc) it grabs lots of battery. Thus, at least for me, after several day testing this is the best suit for me.

10 times thanks to Karam and others helping us!